This is a speed fun painting with a brush I just discovered in photoshop. The brush blends the two colours you have on your pallette together, and the colours that appear to be more prominent is based on the pen pressure. I always wonder if the things I say make sense.
In any case, I personally witnessed a truck with a mattress behind it, and the mattress just flew out, as you can see. It was funny, but dangerous. It was on the highway, but the guy behind the truck didn't get hit by the mattress, which is a good thing.